Car-truck.



H. H. HEWITT.

GAR TRUCK;

APPLICATION FILED MAY 8, 1912.-

Patentd Jan. 5, 1915 frame.

HERBERT H. HEWITT. OF BUFFALO. NEW YORK.

CAR-TRUCK.

Specification of Letters Patent.

iatented Jan. 5, 1915.

Application filed May 8. 1912. Serial No. 696,026.

To all Zr/m it may concern Be it known that l. l-lnnnnn'r H. lrlnwrr'r,

-a citizen of the linited States, and a resident of Bull'alo. county of Erie. and State of New York. have in ented certain new and useful Improvements in Car-'lruclrs. of which the following is a full. clear. and exact descrip tion.

T he invention relates to car trucks of the type set forth in Letters Patent of the United States No. LOOJJalT, issued to me Nox einber 2S, 1911 and in which the side framesof the truck hare an independent rocking move-' a pointed out in the appended claims.

In the drawings, Figure l is a plan view of one-half of the truck with portions of one of the side frames and the journal box shown in horizontal section. Fig. 2 is a side elevatidn with half of the side frame and the journal box shown in vertical. section. Fig. 3 is a detail section on the line 3 of Fig. 2.

Each of the side frames of the improved truck is formed of a single, integral body of metal and is substantially diamond-shaped in outline. The side frame comprises an enlarged central portion 10 and side arms 11 which extend from the upper and lower parts of the central portion 10 and which converge and are connected at the ends of the side The pairs of side arms 11 form in effect upper and lower arch bars. The central portion 10 and the arms 11 are formed of a central integral web having a wide marginal flange 12 at their outer edges. The

. outer ends of the arms 11 are preferably connected by web portions 13 and the inner edges of the arms and of the portions 13 are provided with narro v, marginal strengthening flanges 14.

The car truck is provided with the usual wheel axles 15 having wheels 16 thereon and wprmjecting end journals 1?. The journals 17 extend within journal UOXES 18 which are of usual shape. but which are formed integral "with the side frames. The upper and lower 'niarginal flanges 12 of the side frames and extend between the ends the web l3 merge. as shown, into the inner side walls. ll) of the journal boxes and the latter are formed integral with the top and bottom walls i l and .21. of the boxes and with the outer side walls The top and bottom marginal flanges 1'2 of'the side frames preferably taper slightly from the central portion of the side frame toward the ends thereof. but at the eudsof the side arms, the outer marginal flanges 12 are provided with outwardly curvedportions 2 which merge into the walls of the journal boxes. Strengthening flanges ll extend centrally over the upper portions of the upper side arms 11 and over the top wall 20 of the journal boxes. Smaller strengthening flanges of the lower side arms 11 and the bottom walls of the journal boxes. integral with the parts connected and strengthened thereby. the journal boxes are provided with integral wedge guides 26 and with lids 27 of any suitable form. Each box is also provided with the usual journal bearing a and wedge or key 7).

The enlarged central portion 10 of the side frame is provided with a transverse circular opening having a marginal flange which projects on opposite sides of the central web of the side frame and forms a transverse cylindrical bearing 28. The cylindrical bearing flanges 28 are preferably somewhat wider than the outer marginal flanges 12 and integral, inclined strengthening ribs 29 extend between these flanges. The transverse connecting means between the side frames is provided with cylindrical end members 30 which are journaled within the enlarged central bearings 28 of the side frames to permit the rocking movement of the latter. The side frames are detach-ably held in position by lreys 31. which fit within pockets 32 formed in the frame at opposite sides of the central bearing portion 28 and remo ably held in position in the pockets by bolts 33. The keys project inwardly through elongated slots 3 formed in the cylindrical member 30. In this way the side frames are detachably interlocked with the cylindrical bearing members, but are free to rock to a limited extent relatively thereto and relatively to the transverse connecting means be tween the side frames.

In the construction shown, the cylindrical members 30 are, in efiect, trunnions formed upon the ends of the truck transom. he

These flanges are. of course. formed i transom shown -.comprises side portions 35 ..'frame comprises the enlarged cylindrical which are connected at their "ends and provlded with the cylindrical members or trunnions 30. A bolster 36 arranged between the sides of the transom is supported at its ends 1n the usualmanner by springs 37. I

In the improved construction, each side bearing portion 28, thearms 11 and the journal boxes 18, all formed of a single integral body of metal and preferably of a steel cast- .ing. This construction provides a side frame ofgreat strength and rigidity, but at the same time the side'frames are flexibly connected and are free to'rock independently of one another and relatively to the transverse connecting means between-them, so that the wheels of the truck will follow irregularities of the track without straining or distorting the parts of the truck.

It isobvious that changes may be made in the details set forth 'Without the departure from the essentials of the invention as defined in the claims,

I claim asmy 1nvent1on:

1; A car truck compri'ng side frames,-

each consisting of an enlarged central por tion having-a transverse, flanged, cylindrical bearing opening, integral upper side frames extending outwardly and downwardly from the upper portions of said cylindrical bearing and lower side arms extending outwardly and upwardly from the" lower portions of sa1d bear1ng, and Integral journal boxes connecting the converging ends of said upper and lower side arms, the axes of said iourn'al boxes being in substantial horizontalalinement With the axis of said cylindrical bearing, and transverse connecting means between said side frames having cylindrical end members journaled in the. central bearings thereof to permit the v rocking movement of said side frames, subfrom the upper and lower portions of said enlarged central portion and connected at.

their ends and integral 1ournalboxesat the ends of said side arms, said enlarged central portion and said arms comprising a central web and inner and outer edge flanges, said outer edge flanges merging into the walls of said journal boxes and vertical, longitudinally extendingcentral flanges e x tending between ,sa-idarms and theupper and lowerwalls of said 'journahboxes, sub-' stantially as described.

3.'A side frame for cartruclrs compristransverse, cylindrical bearing, converging 'ing an enlarged central portion, having a boxes at the ends of said side arms all I formed integral with a single body of metal, the axes \of said jou'rnal'boxes-being in sub stantial horizontal alinement With the axis of said cylindrical bearing, substantially as described.

HERBERT H. HEWITT. Witnesses HARRY L. CLAPP, I KATHAniNn GERLAoH. 

